/*
* Copyright 2008 Fedora Commons, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.mulgara.krule.rlog.ast;
import org.mulgara.krule.rlog.ParseContext;
/**
* Marker class to represent top level nodes in the AST.
*
* @created May 16, 2008
* @author Paula Gearon
* @copyright © 2008 <a href="http://www.fedora-commons.org/">Fedora Commons</a>
*/
public abstract class Statement extends Node {
/**
* Create this statement, with the context it requires.
* @param context The context passed in from the parser.
*/
protected Statement(ParseContext context) {
super(context);
}
/**
* Get a list of canonicalized predicates to represent the statement. The body of the
* statement must be sorted, but if a head exists then it must be at the end.
* @return A list containing the statement in canonical form.
*/
public abstract CanonicalStatement getCanonical();
}